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Related Concept Videos

Extraction: Advanced Methods00:56

Extraction: Advanced Methods

937
Metal ions can be separated from one another by complexation with organic ligands–the chelating agent– to form uncharged chelates. Here, the chelating agent must contain hydrophobic groups and behave as a weak acid, losing a proton to bind with the metal. Since most organic ligands used in this process are insoluble or undergo oxidation in the aqueous phase, the chelating agent is initially added to the organic phase and extracted into the aqueous phase. The metal-ligand complex is...
937
Voltammetry: Stripping Methods01:13

Voltammetry: Stripping Methods

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Anodic Stripping Voltammetry (ASV), Cathodic Stripping Voltammetry (CSV), and Adsorptive Stripping Voltammetry (AdSV) are electrochemical techniques used to determine trace amounts of analytes in solution. These methods involve applying a potential to an electrode and measuring the resulting current.
Anodic Stripping Voltammetry (ASV)
ASV is used to determine metals and metalloids at trace levels. It involves two steps: deposition and stripping. First, a negative potential is applied to the...
663

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Nanomaterials-based solid phase extraction and solid phase microextraction for heavy metals food toxicity.

Wajid Ali Khan1, Muhammad Balal Arain2, Mustafa Soylak3

  • 1Department of Chemistry, Abdul Wali Khan University Mardan, 23200, KPK, Pakistan.

Food and Chemical Toxicology : an International Journal Published for the British Industrial Biological Research Association
|August 28, 2020
PubMed
Summary
This summary is machine-generated.

Nanomaterials enhance heavy metal extraction from food using techniques like solid phase extraction (SPE) and solid phase microextraction (SPME). These advanced materials offer superior adsorption for accurate food contaminant analysis.

Keywords:
FoodHeavy metalsNanomaterialsSolid phase extractionSolid phase microextraction

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Area of Science:

  • Analytical Chemistry
  • Materials Science
  • Food Safety

Background:

  • Heavy metals in food pose significant health risks.
  • Traditional extraction methods often lack efficiency and selectivity.
  • Nanomaterials offer unique properties for improved contaminant removal.

Purpose of the Study:

  • To review nanomaterial sorbents for heavy metal extraction in food.
  • To summarize applications in solid phase extraction (SPE) and solid phase microextraction (SPME).
  • To cover literature published from 2015 to May 2020.

Main Methods:

  • Review of scientific literature on nanomaterial sorbents.
  • Focus on carbon nanomaterials (CNMs), magnetic nanoparticles (MNPs), nano-imprinted polymers (NIPs), nano-based metal-organic frameworks (N-MOFs), and silica nanoparticles (SiNPs).
  • Analysis of SPE and SPME techniques for heavy metal preconcentration and determination.

Main Results:

  • Nanomaterials exhibit large surface areas, high selectivity, and fast adsorption capabilities.
  • Various nanomaterials significantly improve the efficiency of SPE and SPME for heavy metal extraction.
  • Specific nanomaterials like CNMs, MNPs, NIPs, N-MOFs, and SiNPs are highlighted for their effectiveness.

Conclusions:

  • Nanomaterial-based sorbents are highly effective for extracting heavy metals from food samples.
  • SPE and SPME coupled with nanomaterials offer advanced solutions for food contaminant analysis.
  • The use of nanomaterials represents a significant advancement in ensuring food safety and quality.